Part Number: LMZ21701SILT

Manufacturer: Texas Instruments

Description: Non-Isolated DC/DC Converters 1A SIMPLE Switcher Nano Mod

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of LMZ21701SILT

Datasheet  LMZ21701SILT datasheet
Category Power Supplies – Board Mount
Family DC DC Converters
Manufacturer Texas Instruments
Packaging Tape & Reel (TR)
Part Status Active
Type Non-Isolated PoL Module
Number of Outputs 1
Voltage – Input (Min) 3V
Voltage – Input (Max) 17V
Voltage – Output 1 0.9 ~ 6 V
Voltage – Output 2
Voltage – Output 3
Current – Output (Max) 1A
Power (Watts) – Manufacture Series
Voltage – Isolation
Applications ITE (Commercial)
Features OCP, OTP, SCP, UVLO
Mounting Type Surface Mount
Package / Case 8-SMD Module
Size / Dimension 0.14″ L x 0.14″ W x 0.07″ H (3.5mm x 3.5mm x 1.8mm)
Operating Temperature -40°C ~ 125°C
Efficiency 95%
Power (Watts) – Max

The LMZ21701SILT is a SIMPLE SWITCHING micro module that comes in an 8-pin SIP packaging. It also has an inbuilt inductor. This tiny module is a step-down DC-to-DC solution that is both easy to use and capable of driving loads of up to 1A in applications with limited space. For the most fundamental level of functioning, a couple of resistors, an input capacitor, an output capacitor, and a soft-start capacitor are necessary.

LMZ21701SILT Features

  • Small 3.5mm x 3.5mm x 1.75mm container.
  • 1A is the current being output.
  • The range of the input voltage is from 3V to 17V.
  • The range of the output voltage is from 0.9V to 6V.
  • The range of the switching frequency is from 1.25 MHz to 2.5 MHz.
  • Transitioning to the mode that saves electricity is seamless.
  • A power good and enable pins, as well as an adjustable soft start function.
  • Current during shutdown of 1.5 A and current during the quiescent state of 17 A
  • Up to 95% in terms of productivity.
  • Temperatures at the junction can reach up to 125 degrees Celsius.

LMZ21701SILT Specifications

Case/Package SMD/SMT
Mount Surface Mount
Number of Pins 8


Efficiency 95 %
Features OCP, OTP, SCP, UVLO
Max Duty Cycle 100 %
Max Input Voltage 17 V
Max Junction Temperature (Tj) 125 °C
Max Operating Temperature 125 °C
Max Output Current 1 A
Max Output Voltage 6 V
Max Supply Voltage 17 V
Min Input Voltage 3 V
Min Operating Temperature -40 °C
Min Output Voltage 900 mV
Min Supply Voltage 3 V
Nominal Supply Current 17 µA
Number of Outputs 1
Operating Supply Voltage 17 V
Output Current 1 A
Output Type Adjustable
Output Voltage 6 V
Packaging Tape & Reel (TR)
Schedule B 8542390000, 8542390000|8542390000|8542390000|8542390000|8542390000
Switching Frequency 2 MHz
Voltage – Output 1 6 V


Height 1.75 mm
Length 3.556 mm
Width 3.556 mm


Lead-Free Lead-Free

 By utilizing this step-down LMZ21701SILT DC to DC converter and switching regulator module, you will be able to provide the capability to switch between different voltages. Its voltage ranges from 0.9 to 6 V. This component can operate at temperatures as high as 125 degrees Celsius, with a minimum operating temperature of -40 degrees Celsius. This item will be packaged on a tape and reel for shipment to ensure a speedy mounting process and a secure delivery.

Frequently Asked Questions

What is a DC-to-DC Converter?

The DC-to-DC converters are responsible for changing the DC voltage level from one level to another. It is required to give a voltage for each electronic device since the operational voltage of various electronic devices, such as ICs and MOSFET, might vary over an extensive range. The output voltage of a Buck Converter is lower than the input voltage, while a Boost Converter’s output voltage is higher than the input voltage.

It is possible to alter the circuit’s ripple, efficiency, and load-transient response by utilizing DC-to-DC Converters. Operating conditions, such as input and output parameters, often determine which exterior parts and components are the most optimal. Thus, standard circuits must be modified to meet each product’s criteria. It takes significant knowledge and experience in the relevant sector to design a circuit that lives up to the specification and fulfills all of the requirements.

In applications where the voltage of the battery may be higher or lower than the output voltage of the regulator, step-up or step-down DC-to-DC Converters are helpful components to maintain a consistent load voltage across the whole battery voltage range while the operation is in progress, the DC-to-DC converter needs to function as either a step-up or step-down voltage supply.

Working Principle of DC-DC converter

An easy-to-understand explanation of how the DC-to-DC converter functions would be helpful. There is an irregular swing in the input current due to the inductor in the input resistance. When the switch is in the “on” position, the inductor draws power from the input and stores it as magnetic energy.

Types of DC-to-DC Converters

Magnetic Converters

These DC-to-DC converters work by cycling energy stored in a magnetic field (often a transformer or inductor) at regular intervals. This spectrum spans 300 kHz to 10 MHz. The quantity of power that must be transmitted constantly to a load can be managed more precisely if the charging voltage’s duty cycle is kept constant.

Additionally, the input current, the output current, or a steady power supply can all be controlled with this method. The isolation between input and output can be provided using a transformer-based converter.

Non-Isolated Converters

When the voltage difference is minimal, non-isolated converters are the most common choice. It has a common ground that connects the input and output terminals. The biggest drawback is that it doesn’t shield you from dangerously high electrical voltages and is noisier.

Step-down/Buck Converters

Non-isolated step-down and buck converters typically have an input voltage VIN and a switching duty cycle D that determines the output voltage VOUT.

Step-up/Boost Converters

An identical set of passive components is utilized. Still, they are organized in such a way as to increase the input voltage, making it possible for a DC-to-DC converter to produce an output voltage that is greater than the input.

Buck-Boost Converters

With this converter, the duty cycle determines whether the DC input voltage is increased or decreased.

Advantages & Disadvantages of DC-to-DC Converters


  • The circuit’s power supply systems are simplified.
  • Both the major and secondary circuits are separated.
  • It gives you a way to boost voltage (potential) as needed.
  • Its components can be found on a single microchip, making it a hybrid circuit.
  • It’s also put to work, keeping DC voltage under control.
  • We may easily categorize the results as either favorable or bad.
  • To conserve room in the battery, a converter can be used.


  • More noise is produced by switching converters.
  • Due to the necessity of an additional circuit, they are pretty pricey.
  • Due to fluctuations in voltage and current, choppers are ineffective.
  • Increasing the input and output capacitance, the ripple current, the losses, etc.


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